Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    352KB

  • Sample

    230416-y8zjtsdf41

  • MD5

    a7e92b6065a8b7859c2a5f2b6af7456d

  • SHA1

    82e16ca74150f0c18c2b80985cc342e7b68d2b01

  • SHA256

    719e4f0ff66bd18cd517da2f7620b292966225ee7e6185d64de444f2181d51ca

  • SHA512

    2d7271d4ed01d5618c40d1a6f391521bb7bf4e75c7d3d8a815a186c00cf784f0e980042b1b2a0ed27c9e8708fb58f26883e5ea0405f5b2874ef86bb9859ac215

  • SSDEEP

    3072:cny/XreDmKCOImk4sYpUCC1cFzMX2kMZtOBiYrsH6tzwPAW/A0VLn0sP9peUIQoY:yytK/I0GCyCtgPrsHTA4AQIsZYUSz2

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      352KB

    • MD5

      a7e92b6065a8b7859c2a5f2b6af7456d

    • SHA1

      82e16ca74150f0c18c2b80985cc342e7b68d2b01

    • SHA256

      719e4f0ff66bd18cd517da2f7620b292966225ee7e6185d64de444f2181d51ca

    • SHA512

      2d7271d4ed01d5618c40d1a6f391521bb7bf4e75c7d3d8a815a186c00cf784f0e980042b1b2a0ed27c9e8708fb58f26883e5ea0405f5b2874ef86bb9859ac215

    • SSDEEP

      3072:cny/XreDmKCOImk4sYpUCC1cFzMX2kMZtOBiYrsH6tzwPAW/A0VLn0sP9peUIQoY:yytK/I0GCyCtgPrsHTA4AQIsZYUSz2

    Score
    10/10
    tofseexmrigevasionminerpersistencetrojan

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

      minerxmrig

    • XMRig Miner payload

      miner

    • Creates new service(s)

      persistence

    • Modifies Windows Firewall

      evasion

    • Sets service image path in registry

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks